CN109999643B - Anti-blocking cooling device for flue gas inlet of deacidification tower and using method - Google Patents
Anti-blocking cooling device for flue gas inlet of deacidification tower and using method Download PDFInfo
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- CN109999643B CN109999643B CN201910370508.3A CN201910370508A CN109999643B CN 109999643 B CN109999643 B CN 109999643B CN 201910370508 A CN201910370508 A CN 201910370508A CN 109999643 B CN109999643 B CN 109999643B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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Abstract
The invention discloses an anti-blocking cooling device for a flue gas inlet of an acid removal tower, which comprises an acid removal tower body (1) and an air inlet (4), wherein a first nozzle (21) is arranged at the air inlet (4), the first nozzle is communicated with an annular water pipe (3), the annular water pipe (3) is also communicated with a connecting pipe (31), and a second nozzle (22) is arranged on the connecting pipe (31); the connecting pipe (31) is provided with a detachable recovery device, and the annular water pipe (3) is provided with a water inlet (32). The invention also discloses a use method of the anti-blocking cooler for the flue gas inlet of the deacidification tower. The device and the using method can isolate the high-temperature flue gas from the flue, can take away the settled foreign matters in the flue gas in time, avoid forming 'stalactite' shaped plugs on the flue, and reduce the damage to the flue material caused by high-temperature, high-humidity and high-acidity corrosion.
Description
Technical Field
The invention relates to an anti-blocking cooling device for a flue gas inlet of a deacidification tower. The invention also relates to a use method of the deacidified flue gas for cooling and anti-blocking.
Background
The incineration flue gas of thermal power generation, household garbage incineration, hazardous waste incineration and the like contains high-concentration acidic substances (mainly SO2 and HCl), in order to make the smoke reach the emission standard, the acidic substance is removed by adopting a wet deacidification process with alkaline liquid (such as NaOH) with certain concentration as an absorbent, because a large amount of acidic substances in the flue gas and the absorbent react rapidly at high temperature to form salt, the circulating liquid is in direct contact with the high-temperature flue gas, the rapid flash evaporation of water causes salt crystallization, the deposition of crystallized salt at the inlet of the wet-process deacidification tower causes blockage, and in addition, the flue gas contains a large amount of tiny dust, and is mixed with the crystallized salt to form a high-hardness substance like 'stone-like milk', so that the blockage at the inlet of the flue gas of the wet-process deacidification tower is further aggravated; in addition, the inlet flue of the wet deacidification tower is provided with pre-cooling spraying, so that the inlet flue is prevented from being blocked, industrial water is used for spraying, the temperature of the flue gas is reduced to be below 160 ℃, the waste of the industrial water is caused, and the sewage amount of a deacidification system is increased.
Disclosure of Invention
The invention aims to solve the technical problem of providing an anti-blocking temperature-reducing device for a flue gas inlet of an acid-removing tower and a using method thereof, wherein the anti-blocking temperature-reducing device can not only pre-reduce the temperature by spraying, but also meet the isolation between high-temperature flue gas and the inner wall of a flue, and simultaneously reduce the consumption of circulating water.
The technical scheme of the invention is as follows:
the invention provides an anti-blocking and cooling device for a flue gas inlet of an acid removal tower, which comprises an acid removal tower body and an air inlet, wherein at least two fixing through holes are uniformly wound on the side wall of the air inlet along the inlet position, first nozzles are respectively arranged in the at least two fixing through holes in a penetrating manner, one end, extending into the air inlet, of each first nozzle is of a wedge-shaped structure with a rectangular cross section, the axial center line of the wedge-shaped structure is mutually vertical to the axial center line of the air inlet, an included angle of 5-10 degrees is formed between the water outlet direction of each first nozzle and the axial direction of the air inlet, the other end of each first nozzle extends out of the corresponding position of the air inlet and is in threaded connection with an annular water pipe, and the axial center line of the annular water pipe and the axial center line; the annular water pipe is also communicated with a connecting pipe, the connecting pipe penetrates into the air inlet from a corresponding position of the side wall of the air inlet, the penetrating end of the connecting pipe is communicated with a second nozzle, the second nozzle is a conical spiral nozzle, and the central line of the conical spiral nozzle is superposed with the axial central line of the air inlet; the connecting pipe is provided with a detachable recovery device, the annular water pipe is provided with a water inlet, and the water inlet is communicated with the corresponding position of the recovery device.
Preferably, the recovery device comprises a pull rod in threaded connection with the connecting pipe, a water collecting tank is arranged on the inner wall of the deacidification tower body and corresponds to the lower end position of the communication position of the air inlet and the deacidification tower body, the water collecting tank is connected with the pull rod, and one end of the outer side wall of the water collecting tank is attached to the inner wall of the deacidification tower body at the corresponding position; the water collecting tank is connected with a water pump, and the water pump is connected with the water inlet.
Preferably, a filter screen is arranged in the water collecting tank.
Preferably, the width of the water inlet position of the water collecting tank is larger than the radius of the air inlet and smaller than the diameter of the air inlet.
The invention also provides a use method of the anti-blocking cooler for the flue gas inlet of the deacidification tower, which comprises the following steps: 1) introducing flue gas into an air inlet;
2) NaOH solution is used as circulating liquid to be filled into a water collecting tank and pumped into an annular water pipe;
3) spraying a circulating liquid through a second nozzle on the annular water pipe to cool the flue gas, and deacidifying to obtain deacidified flue gas; meanwhile, at least two first nozzles communicated with the annular water pipe also spray circulating liquid, the spraying pressure is not lower than 0.4Mpa, because the first nozzles and the air inlet have an included angle of 5-10 degrees in the axial direction, the sprayed circulating liquid is sprayed on the inner wall of the air inlet, under the combined action of the spraying included angle and gravity, the sprayed circulating liquid forms a spiral moving track along the inner wall of the air inlet, under the action of the spraying pressure, the continuously sprayed circulating liquid forms a protective liquid film of 5-10mm on the inner wall of the air inlet, because the salt content in the circulating liquid is increased, the circulating liquid is directly contacted with high-temperature flue gas, the moisture is quickly flashed, salt crystals are separated out and are mixed with dust in the flue gas and then taken away by the circulating liquid in time, and the formation of 'stalactite' shaped blocking objects on the flue is avoided;
4) the sprayed circulating liquid is collected by the water collecting tank, filtered by the filter screen, pumped out by the water pump and pumped into the water inlet of the annular water pipe again, so as to achieve the purpose of recycling.
Has the advantages that: the second nozzles are arranged at the air inlet to spray and cool the flue gas, at least two first nozzles are arranged on the inner side wall surface of the second nozzles and incline by 5-10 degrees along the flow direction of the flue gas, the second nozzles spray the flue gas on the inner side wall surface of the second nozzles to quickly form a uniform protective liquid film which is sprayed on the inner wall of the air inlet and makes a spiral motion track to quickly adhere to the inner wall of the air inlet, so that the aim of isolating the high-temperature flue gas from the air inlet is fulfilled, the settled foreign matters in the flue gas can be timely taken away, the formation of 'stalactite' shaped blocking objects on the inner wall of the air inlet is avoided, and the damage to the.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of an installation structure of the annular water pipe.
Fig. 3 is a schematic view of the mounting structure of the first nozzle.
Fig. 4 is an enlarged view of a portion a in fig. 3.
Fig. 5 is a schematic structural view of the second nozzle.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in figures 1, 2, 3, 4 and 5, the deacidification tower comprises a deacidification tower body 1, an air inlet 4 and the like, wherein three fixing through holes are uniformly wound on the side wall of the inlet position of the air inlet 4, first nozzles 21 are arranged in the three fixing through holes in a penetrating manner, one end of each first nozzle 21 extends into the corresponding position of the air inlet 4, the other end of each first nozzle extends out of the corresponding position of the air inlet 4 and is in threaded connection with an annular water pipe 3, and the axial center line of the annular water pipe 3 is on the same straight line with the axial center line of the air inlet 4. One end of the first nozzle 21 extending into the air inlet 4 is a wedge-shaped structure with a rectangular cross section, the axial center line of the wedge-shaped structure is perpendicular to the axial center line of the air inlet 4, and an included angle of 5-10 degrees is formed between the water outlet direction of the first nozzle 21 and the axial direction of the air inlet 4.
The annular water pipe 3 is also communicated with a connecting pipe 31, the connecting pipe 31 penetrates into the air inlet 4 from the corresponding position of the side wall of the air inlet 4, the penetrating end of the connecting pipe 31 is communicated with a second nozzle 22, the second nozzle 22 is a conical spiral nozzle, and the central line of the conical spiral nozzle is superposed with the axial central line of the air inlet 4.
A recovery device is arranged on the connecting pipe 31 and comprises a pull rod 41 in threaded connection with the connecting pipe 31, a water collecting tank 42 is arranged on the inner wall of the deacidification tower body 1 and corresponds to the lower end position of the communication part of the air inlet 4 and the deacidification tower body 1, the water collecting tank 42 is connected with the pull rod 41, one end of the outer side wall of the water collecting tank 42 is attached to the inner wall of the deacidification tower body 1 at the corresponding position, the width of the water inlet position of the water collecting tank 42 is larger than the radius of the air inlet 4 and smaller than the diameter of the air inlet 4; a filter screen is arranged in the water collecting tank 42, the water collecting tank 42 is connected with a water pump 43, and the water pump 43 is connected with the water inlet 32.
The using method of the invention is as follows:
as shown in fig. 1 to 5, before use, according to the size of the air inlet 4, a proper number of fixing through holes are formed in the side wall of the position of the air inlet 4, if the diameter is 1 meter, three fixing through holes are formed, a first nozzle 21 penetrates through each fixing through hole, the three first nozzles 21 are in threaded connection with the annular water pipe 3, so that the annular water pipe 3 is fixedly wound on the outer side of the side wall of the air inlet 4, the extending end of each first nozzle 21 is of a wedge-shaped structure with a rectangular cross section, the axial center line of the wedge-shaped structure is perpendicular to the axial center line of the air inlet 4, and the water outlet direction of the first nozzle 21 and the axial direction of the air inlet 4 form an included angle of 5-10 degrees, preferably 5 degrees; meanwhile, a connecting pipe 31 communicated with the annular water pipe 3 also penetrates through the corresponding position of the air inlet 4, a penetrating end of the connecting pipe 31 is provided with a second nozzle 22, the second nozzle 22 is a conical spiral nozzle, and the central line of the conical spiral nozzle coincides with the axial central line of the air inlet 4.
Then, the water inlet 32 is connected with the water pump 43, the water pump 43 is connected with the water collecting tank 42 and enters the deacidification tower body 1, the water collecting tank 42 is manually placed at the lower end position of the communication position of the air inlet 4 and the deacidification tower body 1, the pull rod 41 is in threaded connection with the connecting pipe 31, one end of the outer side wall of the water collecting tank 42 is attached to the inner wall of the corresponding position of the deacidification tower body 1, the circulating liquid is finally concentrated on the inner side wall of the lower end of the air inlet 4, the width of the water inlet position of the water collecting tank 42 is larger than the radius of the air inlet 4 and smaller than the diameter of the air inlet 4, and.
When the device is used, the flue gas is firstly led into the air inlet 4, then the NaOH solution is filled into the water collecting tank 42 as the circulating liquid, and the circulating liquid is pumped into the annular water pipe 3.
Then, a circulating liquid is sprayed out through a second nozzle 22 on the annular water pipe 3 to cool the flue gas, and deacidification is carried out at the same time to obtain deacidified flue gas; meanwhile, at least two first nozzles 21 communicated with the annular water pipe 3 also spray circulating liquid, the spraying pressure is not lower than 0.4Mpa, because an included angle of 5-10 degrees is formed between the first nozzles 21 and the axial direction of the air inlet 4, the sprayed circulating liquid is sprayed on the inner wall of the air inlet 4, under the combined action of the spraying included angle and gravity, the sprayed circulating liquid forms a spiral moving track along the inner wall of the air inlet 4, under the action of the spraying pressure, the continuously sprayed circulating liquid forms a protective liquid film with the thickness of 5-10mm on the inner wall of the air inlet 4, because the salt content in the circulating liquid is increased, the circulating liquid is in direct contact with high-temperature flue gas, the moisture is quickly flashed, salt crystals are separated out and are timely taken away by the circulating liquid after being mixed with dust in the flue gas, and the formation of 'stalactite' shaped blocking objects on the inner wall.
Finally, the sprayed circulation liquid is collected by the water collection tank 42, filtered by the filter screen, pumped out by the water pump 43 and pumped into the water inlet 32 of the annular water pipe 3 again, so as to achieve the purpose of recycling.
If the spray nozzle is applied to the air inlet 4 of other specifications, according to the used spray pressure, namely, the spray area formed on the inner wall of the air inlet 4 by using the spray speed, so as to quickly fill the inner wall of the air inlet 4 to form the protective liquid film, a proper number of first nozzles 21 can be adjusted and arranged, for example, when the diameter of the air inlet 4 is two meters under the pressure of 0.4Mpa, eight first nozzles 21 are uniformly arranged along the circumferential direction of the air inlet 4, so that the protective liquid film formed by the circulating liquid quickly and uniformly covers the inner wall of the smoke port, and meanwhile, the flow rate of the circulating liquid is ensured, so as to ensure the thickness of the protective liquid film of 5-10 mm.
After the use, when needing to tear open and trade or overhaul, first nozzle 21 and second nozzle 22 can loosen and take off, and annular water pipe 3 also can take off promptly, and pull rod 41 and connecting pipe 31 are spiro union connection also, and header tank 42 also can be taken out alone so that wash the filter screen promptly, and the dismouting is convenient.
The description of the present invention is consistent with the prior art, and is not repeated herein.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures made by using the contents of the present specification and the drawings can be directly or indirectly applied to other related technical fields, and are within the scope of the present invention.
Claims (5)
1. The utility model provides a deacidification tower flue gas entry prevents stifled heat sink which characterized in that: the deacidification tower comprises a deacidification tower body (1) and an air inlet (4), wherein at least two fixing through holes are uniformly arranged at the position of the air inlet (4) along the side wall of an inlet position in a winding manner, first nozzles (21) are arranged in the at least two fixing through holes in a penetrating manner, one end, extending into the air inlet (4), of each first nozzle (21) is of a wedge-shaped structure with a rectangular cross section, the axial center line of each wedge-shaped structure is perpendicular to the axial center line of the air inlet (4), an included angle of 5-10 degrees is formed between the water outlet direction of each first nozzle (21) and the axial direction of the air inlet (4), the other end of each first nozzle (21) extends out of the corresponding position of the air inlet (4) outwards and is in threaded connection with an annular water pipe (3), and the axial center line of the annular water pipe (3) and the axial center line of the air inlet (4); the annular water pipe (3) is also communicated with a connecting pipe (31), the connecting pipe (31) penetrates into the air inlet (4) from the corresponding position of the side wall of the air inlet (4), the penetrating end of the connecting pipe (31) is communicated with a second nozzle (22), the second nozzle (22) is a conical spiral nozzle, and the central line of the conical spiral nozzle is superposed with the axial central line of the air inlet (4); the connecting pipe (31) is provided with a detachable recovery device, the annular water pipe (3) is provided with a water inlet (32), and the water inlet (32) is communicated with the corresponding position of the recovery device.
2. The anti-blocking temperature-reducing device for the flue gas inlet of the deacidification tower as claimed in claim 1, is characterized in that: the recovery device comprises a pull rod (41) in threaded connection with a connecting pipe (31), a water collecting tank (42) is arranged on the inner wall of the deacidification tower body (1) and corresponds to the lower end position of the communication part of the air inlet (4) and the deacidification tower body (1), the water collecting tank (42) is connected with the pull rod (41), and one end of the outer side wall of the water collecting tank (42) is attached to the inner wall of the deacidification tower body (1) in the corresponding position; the water collecting tank (42) is connected with a water pump (43), and the water pump (43) is connected with the water inlet (32).
3. The anti-blocking temperature-reducing device for the flue gas inlet of the deacidification tower as claimed in claim 2, is characterized in that: a filter screen is arranged in the water collecting tank (42).
4. The anti-blocking temperature-reducing device for the flue gas inlet of the deacidification tower as claimed in claim 2, is characterized in that: the width of the water inlet position of the water collecting tank (42) is larger than the radius of the air inlet (4) and smaller than the diameter of the air inlet (4).
5. The use method of the anti-blocking temperature-reducing device for the flue gas inlet of the deacidification tower according to any one of claims 1 to 4, characterized by comprising the following steps: 1) introducing flue gases into an air inlet (4);
2) NaOH solution is filled into a water collecting tank (42) as circulating liquid and pumped into an annular water pipe (3);
3) circulating liquid is sprayed out through a second nozzle (22) on the annular water pipe (3) to cool the flue gas, and deacidification is carried out at the same time to obtain deacidified flue gas; meanwhile, at least two first nozzles (21) communicated with the annular water pipe (3) also spray circulating liquid, the spraying pressure is not lower than 0.4Mpa, because the first nozzles (21) and the air inlet (4) have an included angle of 5-10 degrees in the axial direction, the sprayed circulating liquid is sprayed on the inner wall of the air inlet (4), under the combined action of the spraying included angle and gravity, the sprayed circulating liquid forms a spiral moving track along the inner wall of the air inlet (4), under the action of the spraying pressure, the continuously sprayed circulating liquid forms a protective liquid film of 5-10mm on the inner wall of the air inlet (4), and because the salt content in the circulating liquid is increased, the circulating liquid is in direct contact with high-temperature flue gas, the moisture is quickly flashed, salt crystals are separated out and are timely taken away by the circulating liquid after being mixed with dust in the flue gas, and the phenomenon that 'stalactite' shaped blocking objects are formed on the flue is avoided;
4) the sprayed circulating liquid is collected by the water collecting tank (42), filtered by the filter screen, pumped out by the water pump (43) and pumped into the water inlet (32) of the annular water pipe (3) again, so as to achieve the purpose of recycling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910370508.3A CN109999643B (en) | 2019-05-06 | 2019-05-06 | Anti-blocking cooling device for flue gas inlet of deacidification tower and using method |
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| CN201910370508.3A CN109999643B (en) | 2019-05-06 | 2019-05-06 | Anti-blocking cooling device for flue gas inlet of deacidification tower and using method |
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| CN109999643B true CN109999643B (en) | 2021-05-11 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102805999A (en) * | 2012-08-23 | 2012-12-05 | 北京威肯众合环保科技有限公司 | Turbulent ball type turbocharging compound desulfurization dust removal tower |
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| DE10332259A1 (en) * | 2003-07-16 | 2005-02-03 | Lurgi Bischoff Gmbh | Process and plant for the desulphurisation and dedusting of waste gases, in particular refinery waste gases |
| CN202527047U (en) * | 2012-04-19 | 2012-11-14 | 北京中大能环工程技术有限公司 | Cooling device for flue gas of inlet of desulfurizing tower |
| CN204365132U (en) * | 2015-01-09 | 2015-06-03 | 山东潍焦集团工程技术有限公司 | Coke oven flue gas desulfurization and denitrification integral equipment |
| US10046274B2 (en) * | 2015-08-28 | 2018-08-14 | Big Monkey Services, LLC. | Methods and systems for inhibiting crystalline buildup in a flue gas desulfurization unit |
| JP2019076798A (en) * | 2016-03-15 | 2019-05-23 | 富士電機株式会社 | Exhaust gas treatment equipment |
| CN206980457U (en) * | 2017-04-05 | 2018-02-09 | 陈华锋 | A kind of fiberglass eddy current type spray equipment |
| CN207169401U (en) * | 2017-08-21 | 2018-04-03 | 卢士钊 | A kind of new wet FGD device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102805999A (en) * | 2012-08-23 | 2012-12-05 | 北京威肯众合环保科技有限公司 | Turbulent ball type turbocharging compound desulfurization dust removal tower |
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